<template>
  <div class="todo-header">
    <input type="text" placeholder="请输入你的任务名称，按回车键确认"
           v-model.trim="text" @keydown.13="addTask"/>
  </div>
</template>

<script>
    // var id = 3;
    export default {
        name: "todo-header",
        data(){
          return {
            text:""
          }
        },
        methods:{
          addTask(){
            //获取id
            var id = localStorage.getItem("todoid") || 0;
            id = +id; //将字符串转为数字
            //创建一个新的任务
            var task = {id:id++,checked:false,text:this.text}
            //将id的改变重新更新到localStorage中
            localStorage.setItem("todoid",id)
            //和app组件进行通信 将task传给app
            this.$bus.$emit("addTask",task)
            //清空输入框
            this.text=""
          }
        }
    }
</script>

<style scoped>
  /*header*/
  .todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
  }

  .todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
  }

</style>
